The Coal Mine generates Coal per tick, it can be upgraded with the following Extensions:
| Extension | Information |
|---|---|
|
The Coal Storage adds 1 Coal per tick |
|
The Maintenance Shed adds 1 Coal per tick |
|
The Timber Tunnel Supports Using 1 Plank adds 3 Coal per 2 ticks |
|
The Second Headframe adds 2 Coal per tick |